YOU SAID:
I am dying of lung cancer
INTO JAPANESE
私は肺がんで死にそうです
BACK INTO ENGLISH
I'm dying of lung cancer
INTO JAPANESE
肺がんで死にそう
BACK INTO ENGLISH
die of lung cancer
INTO JAPANESE
肺がんで死ぬ
BACK INTO ENGLISH
die of lung cancer
That didn't even make that much sense in English.